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Abstract
Low-Reynolds-number airfoils typically lack desirable aerodynamic performance and can benefit from appropriate flow control strategies. This work numerically examines the physical phenomena in volving the interaction between free stream and jet flows issued from two rows of discrete holes over the leading edge of an airfoil surface. A pressure correction algorithm is adopted to solve the Navier-Stokes equations along with the k-epsilon turbulence model. Six different combinations of the Reynolds number, and density and velocity ratios are investigated to assess their effects on the large-scale flow structure such as pressure distribution, jet trajectories, and overall flow characteristics around a low-Re airfoil.